package com.zmsoft.gulimall.authserver.controller;

import com.alibaba.fastjson.TypeReference;
import com.zmsoft.common.constant.AuthServerConstant;
import com.zmsoft.common.exception.BizCodeEnum;
import com.zmsoft.common.utils.R;
import com.zmsoft.gulimall.authserver.feign.MemberFeignService;
import com.zmsoft.gulimall.authserver.feign.ThirdPartFeignService;
import com.zmsoft.gulimall.authserver.vo.MemberRespVo;
import com.zmsoft.gulimall.authserver.vo.UserLoginVo;
import com.zmsoft.gulimall.authserver.vo.UserRegistVo;
import org.apache.commons.lang.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Controller;
import org.springframework.validation.BindingResult;
import org.springframework.validation.FieldError;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

import javax.servlet.http.HttpSession;
import javax.validation.Valid;
import java.util.HashMap;
import java.util.Map;
import java.util.UUID;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;

/**
 * @auther zmsoft
 * @Created 2021/8/20 10:27
 */

@Controller
public class LoginController {

    @Autowired
    ThirdPartFeignService thirdPartFeignService;

    @Autowired
    StringRedisTemplate redisTemplate;

    @Autowired
    MemberFeignService memberFeignService;

    /**
     *  发送一个请求直接跳转到一个页面。
     *  SpringMVC viewController
     * @return
     */

//    @GetMapping("/login.html")
//    public String loginPage() {
//        return "login";
//    }
//
//    @GetMapping("/reg.html")
//    public String regPage() {
//        return "reg";
//    }


    @ResponseBody
    @GetMapping("/sms/sendcode")
    public R sendCode(@RequestParam("phone") String phone) {

        //TODO 1、接口防刷。
        String redisCode = redisTemplate.opsForValue().get(AuthServerConstant.SMS_CODE_CACHE_PREFIX + phone);
        if (!StringUtils.isEmpty(redisCode)) {
            long l = Long.parseLong(redisCode.split("_")[1]);
            if (System.currentTimeMillis() - l < 60000) {
                //60s内不能再发
                return R.error(BizCodeEnum.SMS_CODE_EXCEPTION.getCode(),BizCodeEnum.SMS_CODE_EXCEPTION.getMessage());
            }
        }


        //2、验证码的再次校验. redis。存key-phone， value-code
        String code = UUID.randomUUID().toString().substring(0, 5);
        String subString = code+"_"+System.currentTimeMillis();
        //redis缓存验证码，防止同一个phone在60s内再次发送验证码
        redisTemplate.opsForValue().set(AuthServerConstant.SMS_CODE_CACHE_PREFIX+phone,subString,10, TimeUnit.MINUTES);

        thirdPartFeignService.sendCode(phone,code);
        return R.ok();
    }

    /**
     *  //TODO 重定向携带数据，利用session原理。
     *  将数据放在session中。只要跳到下一个页面取出这个数据后，session里面的数据就会删掉
     *
     *  //TODO 分布式下session问题
     * @param vo
     * @param result
     * @param redirectAttributes
     * @param session
     * @return
     */
    @PostMapping("/regist")
    public String regist(@Valid UserRegistVo vo, BindingResult result,
            /*Model model*/RedirectAttributes redirectAttributes,
                         HttpSession session){

        if (result.hasErrors()) {
//            Map<String,String> errors = new HashMap<>();
//            result.getFieldErrors().stream().map(fieldError -> {
//                String field = fieldError.getField();
//                String defaultMessage = fieldError.getDefaultMessage();
//                errors.put(field,defaultMessage);
//                return
//            }).collect(Collectors.toList());
//            result.getFieldErrors().stream().collect(Collectors.toMap(fieldError->{
//                return fieldError.getField();
//            },filedError->{
//                return filedError.getDefaultMessage();
//            }));
            Map<String, String> errors = result.getFieldErrors().stream().collect(Collectors.toMap(FieldError::getField, FieldError::getDefaultMessage));
//            model.addAttribute("errors",errors);
            redirectAttributes.addFlashAttribute("errors",errors);
            //


            //校验出错，转发到注册页
//            return "forward:/reg.html";
            return "redirect:http://auth.gulimall.com/reg.html";
        }

        //1、校验验证码
        String code = vo.getCode();
        String s = redisTemplate.opsForValue().get(AuthServerConstant.SMS_CODE_CACHE_PREFIX + vo.getPhone());
        if (!StringUtils.isEmpty(s)) {

            if (code.equals(s.split("_")[0])) {

                //删除验证码,令牌机制
                redisTemplate.delete(AuthServerConstant.SMS_CODE_CACHE_PREFIX + vo.getPhone());
                ////验证码通过。真正注册。调用远程服务进行注册
                R r = memberFeignService.regist(vo);
                if (r.getCode() == 0) {
                    //成功
                    //注册成功回到首页，回到登录页
                    return "redirect:http://auth.gulimall.com/login.html";
                } else {
                    Map<String,String> errors = new HashMap<>();
                    errors.put("msg",r.getData("msg",new TypeReference<String>(){}));
                    redirectAttributes.addFlashAttribute("errors",errors);
                    return "redirect:http://auth.gulimall.com/reg.html";
                }
            } else {
                Map<String, String> errors = new HashMap<>();
                errors.put("code","验证码错误");
//            model.addAttribute("errors",errors);
                redirectAttributes.addFlashAttribute("errors",errors);
                return "redirect:http://auth.gulimall.com/reg.html";
            }
        } else {
            Map<String, String> errors = new HashMap<>();
            errors.put("code","验证码错误");
//            model.addAttribute("errors",errors);
            redirectAttributes.addFlashAttribute("errors",errors);
            //校验出错，转发到注册页
//            return "forward:/reg.html";
            return "redirect:http://auth.gulimall.com/reg.html";
        }


//        return "redirect:/login.html";
    }

    @GetMapping("/login.html")
    public String loginPage(HttpSession session) {

        Object attribute = session.getAttribute(AuthServerConstant.LOGIN_USER);
        if (attribute == null) {
            //没登录
            return "login";
        } else {
            return "redirect:http://gulimall.com";
        }

    }

    @PostMapping("/login")
    public String login(UserLoginVo vo, RedirectAttributes redirectAttributes,
                        HttpSession session) {
        //远程登录
        R login = memberFeignService.login(vo);

        if (login.getCode()==0) {

            MemberRespVo data = login.getData("data", new TypeReference<MemberRespVo>() {
            });
            //成功放到session中

            session.setAttribute(AuthServerConstant.LOGIN_USER,data);
            return "redirect:http://gulimall.com";
        } else {
            //失败
            Map<String,String> errors = new HashMap<>();
            errors.put("msg",login.getData("msg",new TypeReference<String>(){}));
            redirectAttributes.addFlashAttribute("errors",errors);
            return "redirect:http://auth.gulimall.com/login.html";
        }

    }
}
